Network address
The MAC address for this LAN interface. Use this parameter when you intend to run SNA protocols over this LAN interface. Ensure that the network address for this adapter is different from the one used on the peer at the other end of this LAN interface.
Allow to manage advanced parameters
Checking this means that this system uses the default packet and window values on the X.25 Packet Properties page for this LAN interface.
Packet size
Defines the preferred or default maximum X.25 packet for this LAN interface. You can specify different values for Transmit and Receive defaults.
Window size
Configures a window-size preference for this LAN interface. You can specify different values for Transmit and Receive defaults.